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BTrace: A safe, dynamic tracing tool for the Java platform

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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import org.openjdk.btrace.core.annotations.BTrace;
import org.openjdk.btrace.core.annotations.OnExit;
import org.openjdk.btrace.core.annotations.OnTimer;

import static org.openjdk.btrace.core.BTraceUtils.Sys;
import static org.openjdk.btrace.core.BTraceUtils.println;

/**
 * This program demonstrates OnExit probe.
 * When some BTrace action method calls "exit(int)"
 * built-in function, method annotated by @OnExit
 * (if found) is called. In this method, BTrace script
 * print summary information of tracing and/or do clean-up.
 */

@BTrace
public class ProbeExit {
    private static volatile int i;

    // @OnExit is called when some BTrace method
    // calls exit(int) method
    @OnExit
    public static void onexit(int code) {
        println("BTrace program exits!");
    }

    // We just put @OnTimer probe and exit BTrace
    // program when the count reaches 5.

    @OnTimer(1000)
    public static void ontime() {
        println("hello");
        i++;
        if (i == 5) {
            // note that this exits the BTrace client
            // and not the traced program (which would
            // be a destructive action!).
            Sys.exit(0);
        }
    }
}